Improvement in hanging millstones



A. w. wlNALL. Han'ging Mill-Stones.

UNITED STATES ALEXANDER W. WINALL, OF CINCINNATI, OHIO.

IMPROVEMENT IN HANGING MILLSTONES.

Specification forming part of Letters Patent No. 139,642, dated J une 3, 1873; application filed April 9, 1873.

To all lwhom 'it may concern:

Be it known that I, ALEX. W. WINALL, of

Cincinnati, inthe county of Hamilton and in the State of Ohio, have invented certain new and useful Improvements in Hanging Millstones;

and do hereby declare that the following is a parts in each of the figures.

The object of my invention is to enable a spindle and running-stone to be easily and securely connected together; "and it consists principally in combining` the bushing and spindle by means ot' a key passing horizontally through the latter and resting within a groove in the upper surface of the former, substantially as and for the purposellereinafter shown. It consists, further, in combining, with the bushing, spindle, and keyabove named, a second key,passing through said shaft immediately below the stone, substantially as and for the purpose hereinafter set forth. ltconsists, finally, in combining, with the running-stone, bushing, spindle, and keys, a filling of molten metal, substantially as and for the purpose hereinafter shown and described.

In the annexed drawing, A represents a metal bushing having, preferably, a rectangular form horizontally, and provided at equidistant points `upon its sides with four lugs or flanges, c, which project radially outward, as shown in Fig. 1.

The bushing, thus formed, is placed within the center of a millstone, B, either at the time said stone is built, or by introducing said `bushing into a corresponding opening cut within the back of said stone after the completion of the latter, after which the spindle C is introduced and connected with said bushing by means of a key, D, that passes radially through said spindle and rests within a groove, a', cut within the upper surface of the former.

A second key, E, is now passed Athrough a suitable opening in the spindle, immediately below the lower side of the stone, and, bearing A against the latter, locks said spindle and the bushing firmly together, after which molten lead F, or other suitable metal, is poured into the upper end of the central opening in said stone, and all of the space around and between said parts closely filled, by which means said parts and stone are securely locked together and ,notv liable to displacement.

The lower end ofthe bushing may be enlarged horizontally and its lower face made flush with the corresponding face of the stone; or, if desired, said enlargement may be omit ted, and said bushing raised sufficiently to admit of the insertion of a separate plate', G,

having a size and shape corresponding to that of said enlargement.

The attachment thus shown is simple, effiA cient, and durable, and can be readily placed in or removed from position when desired.

Having thus fully set forth the nature and merits of my invention, what I claimas newv 1. The combination of the bushing Aiprovided with the groove a, and the spindle G provided with the radial key D, substantially as and for the purpose shown.

2. In combination with thebushing- A, spindle C,and key D,the keyE, substantially as and for the purpose set forth.

3. In combination with the stone B the bushing A provided with the flanges a. and' groove a', the spindle (l, and thekey D, the lead filling F, substantially as and for the purpose shown and described.

In testimony that I claim the foregoing I have hereunto set my hand this 19th day of March, 1873.

ALEXANDER W. WINALL. Witnesses:

J. R. SAYLER, W. H. PARsHALL. 

